Neo uses a distributed task of Byzantine generals (or dBFT). This is an improved form of mechanism of consensus Proof-of-stake (PoS). Ethereum, in turn, uses a more intensive and energy-intensive mechanism of Proof-of-work (PoW). Recently, Ethereum has made progress in adopting a proof-of-stake algorithm that will increase its speed and efficiency, but will still lag behind NEO.
Neo mechanism developed antique cryptography called Neo. Quantum computers have the right to manipulate the blockchain. However, if there is such a problem, it will not affect Neo.


The core of the NEO feature set revolves around tools that allow developers to efficiently deploy and scale smart contract applications on the NEO blockchain.

NEP5 Communications Standard - the NEP5 gives developers a standardized workflow and template to build decentralized applications. All tokens using the NEP5 standard are automatically able to transact with any other token using the NEP5 standard which allows for applications such as decentralized exchanges and other more advanced cross token communication.[16]
X.509 Digital Identities allow developers to tie tokens to real world identities which aids in complying with KYC/AML and other regulatory requirements[10]
NeoX – A cross chain protocol that will allow NEO tokens to communicate with tokens on other blockchains.
NeoFS – A decentralized file sharing service based on the InterPlanetary File System.
NeoQ – A lattice-based cryptographic mechanism which creates problems that cannot be solved by quantum computers and ensuring being quantum-proof

https://en.wikipedia.org/wiki/NEO_(cryptocurrency)#Features